Owner/Creator:

Contact:

Keywords:

Arctic LTER keywords:

Date Range:

Sunday, May 1, 1977 to Thursday, September 1, 1977

Publication Date:

Wednesday, December 12, 1979

Methods:

The samples were taken with a 30 cm diameter plankton net with 335 um mesh plankton netting. In almost all cases replicate vertical tows were taken with the length varying on the depth of the lake. The samples were preserved in an alcohol/formalin solution and stored in 250 ml Nalgene bottles. The samples were counted by taking a sub-sample of 1 or 2 ml from the bottle and enumerating all zooplankton by species using a M-5 steromicroscope. The entire sample was surveyed for the 3 large species- D. middendorffiana, Heterocope, and Holopedium. All of the samples were counted and enumerated by Sun Yong.

Reference Citations: None relavant to this particular data

Sampling Description.

Only Toolik Lake was sampled during the summer
1977. The data file incorrectly indicates that the samples were vertical
tows. What the data represent is the density of zooplankton collected with
a 120 liter Schindler-Patalas plankton trap taken out at the main station.
Depending upon the depth at the time of sampling, samples were taken
every 2 meters starting at 1 m down to the bottom, which varied from
19 to 13 meter de

Variable Details

(Variables names are in the first line/row of the CSV file and Excel data sheet.)

Lake

Label: Lake

Definition: Lake name

Type: Nominal

Missing values: None specified

Site Code

Label: Site Code

Definition: Arctic LTER site code

Type: Nominal

Missing values: None specified

Treatment

Label: Treatment

Definition: Treatment

Type: Nominal

Missing values: None specified

Tow type

Label: Tow type

Definition: Type of tow (vertical or sweep)

Type: Nominal

Missing values: None specified

Tow Length (m)

Label: Tow Length (m)

Definition: Length of tow in meters

Type: Physical quantity

Unit: meter

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

. = Missing or Not Measured

Depth (m)

Label: Depth (m)

Definition: Depth in meters

Type: Physical quantity

Unit: meter

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

. = Missing or Not Measured

Date

Label: Date

Definition: Date of tow

Type: Date/time

Date format: dd-mmm-yyyy

Missing values:

. = Missing or Not Measured

D. midd

Label: D. midd

Definition: Daphnia middendorfiana (number per liter)

Type: Physical quantity

Unit: number

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

. = Missing or Not Measured

D. long

Label: D. long

Definition: Daphnia longiremis (number per liter)

Type: Physical quantity

Unit: number

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

. = Missing or Not Measured

Bosmina

Label: Bosmina

Definition: Bosmina longirostris (number per liter)

Type: Physical quantity

Unit: number

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

. = Missing or Not Measured

Holo

Label: Holo

Definition: Holopedium gibberum (number per liter)

Type: Physical quantity

Unit: number

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

. = Missing or Not Measured

Heter

Label: Heter

Definition: Heterocope septentrionalis (number per liter)

Type: Physical quantity

Unit: number

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

. = Missing or Not Measured

D. prib

Label: D. prib

Definition: Diaptomus pribilofensis (number per liter)

Type: Physical quantity

Unit: number

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

. = Missing or Not Measured

C. scutt

Label: C. scutt

Definition: Cyclops scutifer (number per liter)

Type: Physical quantity

Unit: number

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

. = Missing or Not Measured

P. ped

Label: P. ped

Definition: Polyphemus pedunuclus (number per liter)

Type: Physical quantity

Unit: number

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

. = Missing or Not Measured

D. pulex

Label: D. pulex

Definition: Daphnia pulex (number per liter)

Type: Physical quantity

Unit: number

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

. = Missing or Not Measured

Eurycercus

Label: Eurycercus

Definition: Eurycercus (number per liter)

Type: Physical quantity

Unit: number

Maximum: Not specified

Minimum: Not specified

Precision: Not specified

Missing values:

. = Missing or Not Measured

Extra

Label: Extra

Definition: Other species (number per liter)

Type: Nominal

Missing values: None specified

Comments

Label: Comments

Definition: Notes about data

Type: Nominal

Missing values: None specified

This material is based upon work supported by the National Science Foundation under Grants #DEB-1637459, 1026843, 9810222, 9211775, 8702328; #OPP-9911278, 9911681, 9732281, 9615411, 9615563, 9615942, 9615949, 9400722, 9415411, 9318529; #BSR 9019055, 8806635, 8507493. Any opinions, findings, conclusions, or recommendations expressed in the material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation.